Sandpapering-machine.



G. A. BARKER. SANDPAPBRING MACHINE.

Patented Dec. 6, 1910.

G. A. BARKER.

SANDPAPERING MACHINE. I APPLIOATION FILED DEO.17,1909.

Patented Dec. 6, 1910.

2 SHEETS-SHEET 2- hNY ran s rarns Parana orrron.

GEORGE A. BARKER, 0F GAMBRIA, VIRGINIA, ASSIGNOR TO THE BARKER MANU- FACTURING COMPANY, OF CAMBRIA,

VIRGINIA.

SANDPAPERING-MACI-IINE.

Specification of Letters Patent.

Patented Dec. 6, 1910.

To all whom it may concern:

Be it known that I, GEORGE A. BARKER, citizen of the United States, residing at Oambria, in the county of Montgomery and State of Virginia, have invented certain new and useful Improvements in Sandpapering-Machines, of which the following is a specification.

The object of this invention is to provide a machine wherein an endless belt of abrading material is supported and driven, and to provide in connection therewith a work support rotatable to permit every portion of a cylindrical piece of work to be applied to the abrading belt, and further to provide in connection with the abrading belt, abrading rolls having any desired contour, whereby special work may be performed, and particularly rolls formed with channels of Va rious depths or forms, whereby round work may be smoothed or abraded in the direction of its grain.

The invention comprises, in its general features, a supporting framehaving at opposite ends the opposed rolls, one driven from the other, upon which an endless belt of abrading material is carried. The frame also supports intermediate of its ends a laterally sliding carriage having therein an ad justable stock screw whereby work may be supported in the carriage and rotated in contact with the face of the abrading belt. Provision is also made for adjusting the opposed rolls so that they shall be parallel with each other, and for thereby slackening or tightening the endless belt and rendering it easy to remove the same when desired.

For a full understanding of the invention and the merits thereof, and to acquire a knowledge of the details of construction, reference is to be had to the following description and accompanying drawings, in which:

Figure 1 is a perspective view of my invention; Fig. 2 is a longitudinal section thereof; Fig. 3 is a plan view of the work support; Fig. 4 is a fragmentary end view; Fig. 5 is a longitudinal section through the Work holder or carriage; Fig. 6 is a detail perspective view of the bed plate, showing the latch for holding it in place; and, Fig. 7 is a detail perspective view of one of the abrading rolls used for polishing roundedged material.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Referring to these figures, 2 designates the sills of the machine, 3 and 4 vertical standards at opposite ends of the sills, the standard 4 being higher than the standards 3, and 5 designates a connecting brace between the standards. Supported in bearings on the standards 3 is the rotatable shaft 6 carrying at one end the drum 7 and at the other the fast and loose pulleys 8 whereby the shaft may be rotated. The standards 4 are connected by a cross piece 9 having guide flanges 10 at the opposite ends, these flanges being under-cut. Supported on the cross piece 9 is the sliding plate 11 whose edges are outwardly beveled to fit beneath the under-cut portions of the flanges. The forward end of the sliding plate is formed with the downwardly depending lug 12 having therein the adjusting screw 13 which engages with the cross piece 9 so that the plate 11 may be adjusted within the cross piece. Pivotally supported upon the plate 11 is the shaft-supporting plate 14 which is provided at opposite ends with the bearings 15 for the shaft 16 and is also provided with the upwardly projecting arm 17 which is engaged by an adjusting screw 18 passing through an ear 19 extending upwardly from the plate 11. It will be obvious that by operating this adjusting screw, the plate 14 may be rotated to greater or less degree upon its pivot 14*, so that the shaft 16 may be brought into parallel relation with the shaft 6 or out of parallel relation thereto. The reason for having the shaft 16 adjustable so that its angularrelation to the shaft 6 may be changed, is that in gluing up the abrading belts it is almost impossible to glue the ends of the belt-s evenly, hence the one side of the belt will be a fraction longer than the other, and if put upon a pair of absolutely parallel drums, the sand belt would work over to the tight or shorter side. 3 having one drum on an angularly adjustable support, I can adjust the sand belt so that it runs evenly, no matter whether it is shorter on one side or not.

The shaft 16 projects out to one side of the pivoted plate 14 and carries upon it the removable roll 20. This roll, While it may have any desired configuration, may be conveniently formed with a plurality of channels and grooves formed in its face, to be later described. Either corrugated or smooth rolls 20 may be used upon the projecting end of the shaft, and these rolls are held in place by means of'a nut 21 which engages with the extremity of the shaft and clamps the roll in place thereon.

Mounted between the ends of the supporting frame are the vertical standards 22 which are longitudinally slotted for vertical adjustment, and engage with bolts and nuts 23 whereby the standards may be held in their adjusted position.

Mounted upon the upper ends of the standards is the transverse cross piece 24: upon which is pivotally supported the channeled bed 25, this bed being provided with.

under-cut side flanges and forming a guideway for the slide 26. A latch 27 is pivoted to the under side of the channeled bar so as to engage over the end of the bar 24: when the bed plate 25 is in its proper position. A spring 28 forces the latch into engagement. The end of the latch projects outto form a handle whereby the latch may be operated.

Mounted in the channeled bar is the slide 26 having at one end the upwardly projecting post, 29 through which passes the crank 30, said crank having its inner end made sharp or otherwise adapted to engage the extremity of a piece of work to be operated on. The other end of the slide 26 islongitudinally slotted, as at 31, and carries upon it the sliding post 32 which has a screw passing down through the slot provided inits inner end with a nut, this nut fitting a longitudinally extending recess 33 in the under face of the slide so that the screw may be r0- tated without rotating the nut, and thus bind the movable post 32 in any adjusted position. The extremity of this post is provided with the adjustable stock screw 34 whereby the work may be clamped between the posts. It will be seen that this construction provides a transversely movable carriage. having a work support thereon so arranged that the work. may be rotated while the carriage is moving laterally.

Passing over the drums 7 and 20 is an endless belt 25 of any suitable material and covered with abrasive or polishing material, such as sand, emery, pumice stone, or the like. The belt may be removed, however, and the drums 7 and 20 when desired be removed, and drums having abrasive material upon their surfaces may be substituted.

The operation of my invention is obvious. The work, as for instance, a curtain rod or like cylindrical article, is placed within the work-supporting carriage, and the machine started. As the abrading belt is. carried around the opposed drums, the work is rotated by rotating the handle 30, while at the same time the slide 26 is moved laterally so as to bring every part of the work in contact with the abrading belt. This rough finishesthe object, suchas a curtain pole, for the reason that the abrading material is passing transversely to the grain of the wood. In order to secure a proper finish to the Work, it is held against the drum or roll 20 and preferably against a roll having therein the circumferentlal grooves 20 which thus act to properly smooth the work with the grain. The straight-faced roll or drum 20- is particularly adapted for smoothing curved drawer fronts on otherlike ob.- jects. This. drum or roll will be. made of wood about fourteen. incheslong and six inches, in. diameter, and. covered. with. felt. Varioussized rolls or drums may beused to suit different work. The corrugated. rolls or drums are particularly adapted. for sand ing cur.tai'n poles or like articles. or round.- edge moldings of various characters and sizes.

It will. be seen. that the supporting bar being pivoted, may be turned intoa position permitting the easy removal of the work, and that it also permits the work to be moved so as to bring it, to various angles with the belt of abradi'ng material, and further that. by adjusting the work. carrier up or down, the degree of. pressure which the" abrading belt or. abrading material. will ex.- ert upon the work, may be adjusted- The belt may be tightened. or loosened by means of the adjusting screw. 13,.and. the beltshafts may be brought into proper parallelism by means of the adjusting screw. 18.

Having thus described the invention,.what I claim is 1. An abrading, machine of. the character described, including a. frame,par.allel drums mounted upon the frame,.means for driving the drums,. an: endless. belt. of. abrading ma terial passing over the drums, a vertically adjustable work. support, a. laterally adj ustable carriage on the work. support, workclamps on the carriage, and. manually operatedmeans for rotating the work-clamps and work. ineither direction.

2. An abrading machine of the. character described, including a frame parallel. drums mounted upon; the frame,,1neans for driving the drums, an endlessbelt of. abrading mas terlal passing over the drums, means fonro-i tating the drums, a transversely extending cross piece mounted between the drums, a. bed plate pivoted to the cross piece,.a trans.- versely. movable: slide, supported on the bed plate, and work. engaging means mounted on drums, vertically adjustable standards located midway between the shafts, a bed plate on said standards having a slideway formed in its upper face, said bed plate being pivotally supported on said standards for movement in a horizontal plane, a latch for holding the free end of said bed plate into engagement with the standards, a slide transversely shiftable in the slideway, upwardly projecting posts on the extremities of the slide, one of said posts being transversely adjustable, and work clamps passing through said posts and adapted to engage with the work, one of said clamps having a crank handle thereon.

4. An abrading machine of the character described, including a frame, standards at opposite ends of the frame, the standards at one end of the frame being higher than the standards at the other, shafts supported in the upper ends of said standards, an upwardly inclined endless belt of abrading material carried on the shafts and rotated therewith, a transversely adjustable work support mounted intermediate of the clamps and beneath the belt, means for moving the shafts relative to each other to slacken or increase the tension of the belt.

5. An abrading machine of the character described, including a frame, oppositely disposed shafts on the frame projecting beyond the frame on one side, means for driving the shaft, drums mounted on the extended ends of the shaft, an endless abrading belt extending over said drums, a transversely movable work carrier mounted beneath the belt to move transversely across the lower stretch of the same, and means on said carrier for supporting and rotating the work to be operated upon.

6. An abrading machine of the character described including a frame, oppositely disposed shafts mounted on the frame, one end of each shaft extending beyond the frame, a drum mounted on the extended end of each shaft, an endless belt of abrading material supported on the drums, vertically adjustable standards located midway between the shafts, a transversely movable work .carrier mounted upon said standards, said carrier being also pivotally supported so as to be rotated in a horizontal plane, and rotatable work clamps mounted on said carrier.

7 An 'abrading machine of the character described, including a frame, parallel shafts mounted at opposite ends of the frame, the like ends of the shafts extending beyond the frame, drums mounted on the extended ends of the shafts, an endless belt of abrading material passing over the drums, and a support for one of said shafts rotatably mounted on the frame for movement in a plane approximately parallel to the plane of the endless belt of abrading material, and means for holding the support and the shaft thereon in various angular relations to the op positely disposed shaft.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE A. BARKER. [L. 5.

Witnesses:

J AS. W. MITCHELL, WALTER L. Hrcxox. 

